- "No son, war is ugly. Fighting is a last resort. Peace? Robots and humans living together as one? THAT is awesome."
- —Dr. Light, Throwing Shade Part I
Dr. Light is a tall and muscular man with white hair and beard. He wears a red shirt, jeans, brown shoes, and a white coat.
Part adventurer, part scientist, all father. Dr. Light has walked some hard paths in his life, but has come out of it a charismatic optimist.
Dr. Light is confident about all things science, less so about social situations. However, he is no "bumbling scientist" – more of a semi-retired adventurer who hates when he has to dress up for a gala.
He has unlimited affection for his children and is a great father who lets them make, and learn from, their own mistakes. He knows that Aki is Mega Man, but is playing along with Aki's "secret identity" until the time is right. He is wise but not "old", kind but not soft. He's gregarious and charismatic until he has to take charge of a situation – then he's brave and resolute.
- Dr Light's VA, Garry Chalk, previously voiced Guts Man, Bright Man, Dark Man, Ring Man, Gyro Man, Spark Man, Needle Man, Heat Man, & Stone Man in the Ruby-Spears cartoon.